Polishing ring

ABSTRACT

A POLISHING RING WITH INDIVIDUAL TEXTILE STRIPS CONSTITUTING A POLISHING BORDER, WHICH COMPRISES A CARRYING RING, AND A PLURALITY OF TEXTILE-STRIPS SURROUNDING THE CARRYING RING IN ABOUT U-SHAPE. THE TEXTILE-STRIPS HAVE MULTI-LAYER LEGS, AND MEANS ARE PROVIDED FOR CONNECTING TOGETHER THE MULTI-LAYER LEGS OUTSIDE OF THE CARRYING RINGS. EACH OF THE U-LEGS FORMS FOLDINGS BY MULTIPLE TWISTING OF THE TEXTILE STRIPS.

RJKNEUSELS POLISHING RING Oct. 19, 1971 2 Sheets-Sheet 1 Filed March 14,1969 Fig.3

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R. KNEUSELS POLISHING RING Oct. 19, 1971 2 Sheets-Sheet 2 Filed March14, 1969 INVENTOR. fl'ww La? w w s k W United States Patent 01 PatentedOct. 19, 1971 ice 3,613,145 POLISHING RING Rudolf Knensels,Wuppertal-Vohwinkel, Germany, assignor to Bi-Flex Birkenstock KG,Wuppertal-Vohwinkel, Germany Filed Mar. 14, 1969, Ser. No. 807,382Claims priority, application Germany, Mar. 16, 1968, P 16 77 44.1 Int.Cl. B24d 13/04 US. Cl. 15230.15 5 Claims ABSTRACT OF THE DISCLOSURE Apolishing ring with individual textile strips constituting a polishingborder, which comprises a carrying ring, and a plurality oftextile-strips surrounding the carrying ring in about U-shape. Thetextile-strips have multi-layer legs, and means are provided forconnecting together the multi-layer legs outside of the carrying ring.Each of the U-legs forms foldings by multiple twisting of thetextilestrips.

The present invention relates to a polishing ring with individualtextile-strips forming a polishing border and disposed in U-shape abouta carrying ring, the multi-layer legs of the textile-strips beingconnected together outside of the carrying ring by a closing seam or thelike.

Polishing rings and polishing discs, respectively, are known, the borderof which comprises a long, passing through band member, which isdisposed in folds such, that the peripheral end face of each textilelayer is arranged about zig-zag and meander-like, respectively (see forexample US. Pat. No. 2,004,623).

Since a plurality of textile layers arranged on top of each other areprovided with uniform folding about the carrying ring, relativelyuniform end zones of larger standstability running through in peripheraldirection result on both sides. This prevents, however, a deeperpenetration of the work piece into the polishing border. Furthermore, bythis arrangement, strips can be created by this formation during thepolishing on the work piece.

Furthermore, polishing rings are known, the border of which is formed ofa plurality of small members produced by narrowly wound textile strips,which small members are disposed U-shaped in successive arrangementabout the carrying ring, whereby the U-legs extending radial directionon the outside of the carrying ring is gripped by means of a closingseam (see US. Pat. No. 2,489,193). The U-legs disposed geometrically inone plane permit, however, likewise the creation of a joint. The presentknob-like U-legs are very solid due to the winding up. A deeppenetration of the work piece is, thus, also here not possible, so thatsubstantially, the previously mentioned drawbacks occur, first of all,when the polishing rings are joined together to a polishing drum.

It is one object of the present invention to provide a polishing ringwhich is designed such that a deep penetration of work pieces into theborder is possible, whereby a better polishing is brought about and inaddition, by example, during Working of sensitive, even planes no stripformation occurs.

It is another object of the present invention to provide a polishingring, wherein each U-leg member is folded, brought about by a multipletwisting of the textile strip.

It is still another object of the present invention to provide apolishing ring, wherein the number of folds of each U-leg of the textilestrip, consisting of a bias cut textile fabric, diminishes in outwarddirection from the apex zone fixed in the twisted position withsimultaneous widening of the individual fold layers.

It is also a favorable feature of the present invention that a pluralityof separately twisted textile-strip-sections are disposed on top of eachother.

It is furthermore of advantage if the textile of the border isimpregnated.

Due to such formation a polishing ring of appreciably improved polishingcharacteristics is produced. The textilestrip-U-members, applied in aplurality thereof and having a multiple twist and providing thereby anextremely fold-rich structure bring about a very elastic polishing body,which permits an extremely deep penetration of the work pieces. First ofall, concerning the edge-rich work pieces, the great danger ofdestruction of the polishing border does not exist any more, since theindividual, loose- 1y disposed textile-strip-sections yield moreelastically than in the known structures of such polishing rings. Thetwisting provides for the afterwards again returning U-leg of thetextile-strip-section, a somewhat bouquet-like structure with deepfolds, which point from the twisting axis into many directions andwhich, depending upon the direction of penetration of the work piece,permits an active participation of all fold layers nearly to the base ofthe polishing border.

The obtained short fold layers in the apex zone of the U-shapedformation, which fold layers widen slowly to the free U-leg end, arefavorable due to the thereby created wedge form of the mounting of suchpolishing rings. The fixing of the apex zone can take place in anydilferent manner and by hot ironing, respectively. By a superposing of aplurality of normally separated but twisted textile-strip-sections, thedensity of such polishing rings can be adjusted to the prevailingapplication. By employing an impregnation for the threads of theinclined textile fabric up to the end range, a strong connection isprovided. The life of such polishing discs is thereby increased. Theirregular arrangement of the textile-stripsections, originating from thetwisting, brings about a line-free polish, even in connection with workpieces consisting of softer working material.

With these and other objects in view, which will become apparent in thefollowing detailed description, the present invention will be clearlyunderstood in connection with the accompanying drawings, in which:

FIG. 1 is a side elevation of a polishing ring designed in alccordancewith the present invention, shown schemat- 1ca y;

FIG. 2 is an elevation of the end face of the polishing rlng;

FIG. 3 is a textile-strip-section prior to the twisting;

FIG. 4 is an elevation of a twisted textile strip section;

FIG. 5 is an elevation of a textile strip section with the U-legsbrought into parallel position;

FIG. 6 is a section along the lines 66 of FIG. 5;

FIG. 7 is a section along the lines 7--7 of FIG. 5; and

FIG. 8 is a section along the lines 8-8 of FIG. 1.

Referring now to the drawings, the polishing ring designed in accordancewith the present invention comprises a carrier ring 1 which consists ofwire, a ring of synthetic material, or the like.

The polishing body is formed of a plurality of separately twistedtextile-strip-sections 2. These are material sections of a conventionalsmooth textile strip 3. The latter comprises bias cut textile fabric. Inorder to obtain a strip length capable of being wound up, severaltextile strip members are joined by gluing, or as shown in theembodiment of FIG. 3, by a seam N. The seam guide is disposed inclinedto the textile strip-side border 3'.

Each textile strip section 2 is twisted about the longitudinal axis xxand folded over the carrier ring 1 so as to have a generally U-shapedform including a bight portion 2' and two substantially equally longlegs 2', 2". The bight portion, as seen in FIG. 7, is more tightlytwisted than the legs, as seen in FIG. 6, said legs becoming lesstightly twisted at progressively further locations away from the bight.

The twisted individual-sections shown in FIG. 5 are aligned on thecarrying ring 1 in series and disposed on top of each other. The U-legsare connected on the outside of the carrying ring 1 by a seam 4.

Referring now to FIG. 8, the desired irregular arrangement originatingfrom the twisted U-legs causing a certain return position force, can berecognized.

The polishing ring is suitably impregnated. Such impregnation therebyperforms a particular task, namely to glue the threads of thetextile-strip-sections which are shorter, whereby the threads are betterheld in connection.

The polishing ring in accordance with the present invention permits thesuspension of the work piece to be polished up to the base 5 of theborder.

While I have disclosed one embodiment of the present invention, it is tobe understood that this embodiment is given by example only and not in alimiting sense.

I claim:

1. A polishing ring with individual textile-strips constituting apolishing border, comprising:

a carrying ring;

a plurality of elongated textile strips, each twisted about its centrallongitudinal axis and folded over said carrying ring, each of saidstrips having a generally U-shaped form including a bight portion andtwo substantially equally long legs, said bight portion being moretightly twisted than said legs, said legs becoming less tightly twistedthan that of said bight portion at progressively further locations awayfrom said bight; and

means for joining said legs to each other and to said carrying ring.

2. The polishing ring, as set forth in claim 1, wherein said textilestrips comprise a bias-cut fabric.

3. A polishing ring as set forth in claim 1, wherein said textile-stripscomprise sections, and a plurality of sections twisted individually aredisposed on top of each other.

4. The polishing ring, as set forth in claim 1, wherein the textilefabric of said polishing border is impregnated.

5. The polishing ring, as set forth in claim 1, wherein said U-legs ofeach of said textile-strips are substantially oriented opposite oneanother.

References Cited UNITED STATES PATENTS 1,817,176 8/1931 Curtis 15-l8l2,783,594 3/1957 Rock 15-230.15 3,090,062 5/1963 Nelson 15179 X3,148,963 9/1964 De Nuke 51401 X LEON G. MACHLIN, Primary Examiner US.Cl. X.R. 29130

